24 kg more likely set 8kg of drag. Looking for spin marlin rod now for 100lb braid on a a sagossa 20k. Hard finding one apart from one heavy duty shimano abyss model. A lot look flimsy.

That's my understanding, the rod is build for that line weight but not rated for a 24 kg dead weight

Kaveman is onto it.  Peter Pakula in one of his articles suggests setting the drag at up to 70% of line strength at Full.  So with 24kg line that would give you 16.8kg of drag at Full.  My thinking however is that many rods that manufacturers rate as 24kg rods would be way past their optimum performance when under 16.8kg of load. 

Well done on the sail Alan, did you get any pics?

The old school kilwell rods I had were rated to the lift weight I believe. I don't know when that changed. The newer rods are better materials and way thinner. I run all 37kg as IMO the 24kg are too light. 

Interesting topic Alan. Until they started rating rods on how heavy a jig they could cast, the agreed interpretation of the rod's rating was, to my understanding, 3 x it's lifting capacity when held at a 45 degree angle with a line through the guides and a weight hanging vertically below the top eye. Max lift is when either the line touches the blank between any 2 guides (common) or the blank locks up & won't bend any further (uncommon, but I have broken 2 rods this way. Better than doing it on a fish I guess.) Not sure how you would test spin rods with the line guides under the blank. 

Right, thanks waynorth. so not as simle  as it might seem.

This makes a lot of sense.